PDF malware analysis — malicious · 7b8794def5a6cab3

MALICIOUS

PDF

80.8 KB Created: 2021-07-07 23:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: d7bd50214ea6f271fe6c760bc17aa578 SHA-1: cadf8a1368ef3294c43639a37ca21c475e3b1f61 SHA-256: 7b8794def5a6cab362b0bbfda48943eab4ab49f2d6bc045a5ef1a938d7741ce5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL targets are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096535af3f58---vagobejunefirufogo.pdf In PDF document text
- https://fruzsiflame.hu/userfiles/file/nadetasitovofokiwaziv.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b405bc4623---weketaparigukolid.pdfIn PDF document text
- https://brahmagnanam.org/fck_uploads/file/fulepelumev.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/3f51f50ed224bacdc782960bf3db546c/5619138456.pdfIn PDF document text
- http://pulsarvn.com/media/ftp/file/tukinujuwofezupoponatitiw.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/anv9r5bp1hk98i5528nadia144/94953780906.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5ir3u45sq66sdcv83as9b8qhba/69909167612.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2be5954f8---kosemuvejotabejewonipida.pdfIn PDF document text
- https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/52f3aa29158bc8f09cd9fa85fa43171d/wogex.pdfIn PDF document text
- https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/1faddad6175c6f40c0c791dd61b77180/15717471972.pdfIn PDF document text
- https://dodatnagarancija.com/userfiles/file/49397551951.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609a419413306---54054426091.pdfIn PDF document text
- http://adaviestransportltd.com/userfiles/file/26669540909.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a483eb481b8---89519532636.pdfIn PDF document text
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/2m0v4fv4v7a1bad7pucp7dtnhr/biwopetaze.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e808412b19e21940e7b6839c58b92024/balafovulowurisef.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f29e8a0cc641e6c925e90b6ac17d4f53/lezesekikizobusa.pdfIn PDF document text
- http://dzstock.com/Upfiles/file/zenopezigu.pdfIn PDF document text
- http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/kuwerobuvugixozezijava.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c931b86c0c8---13129136560.pdfIn PDF document text
- https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/6i05djblsk947finpjjav5em2t/39375542812.pdfIn PDF document text
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54ce6eddfb---42788501389.pdfIn PDF document text
- http://studiomuraca.eu/userfiles/files/3502380367.pdfIn PDF document text
- https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/ad4290cd92fcf45559b9015f69188dd2/4941247470.pdfIn PDF document text
- http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074838497a24---8361725932.pdfIn PDF document text
- https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a40599093---sivobatoxugevowixat.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=aashiqui+2+movie+all+mp3+songPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d7de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7DE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eff0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFF0	16948 bytes
SHA-256: `f5091d524786b2fcdd8b88de385fa8d151e479c3472b5ed34ace6f82ff7198ec`
`font_02_sfnt_off00011c1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C1C	11084 bytes
SHA-256: `89c4c05b912996c2a9038d611d49f713ea733d7a88b7b537494834574f2bd760`

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